Stoker.



S. G. GREENAWALT.

STOKER.

APPLICATION FILED JUNE 1.18116.

LQQ5 SQQQ Patented. May 15, 191?.

3 SHEETS-SHEET I.

uvewtoz wi/www S. G. GREENAWALT.

STOKER.

APPLICATION FILED JUNE I, 1916.

1,225 W2D Patented May15l1917.

3 SHEETSSHEET 2.

WWW fi 722W M A W; v

- Rhea/um S. G. GREENAWALT.

STOKER.

APPLICATION FILED JUNE 1, I916.

Patented. May15, 1917.

3 SHEETS-SHEET 3.

ma ma -.s.errunr. e. GREENAWALT, or snawmrean rants, QUEBEC, omen/a.

STOKEE.

Specification of Letters Patent.

Patented Easy 15, 1311?.

Application filed 1' une 1, 1916... Serial No. 101,018.

To all whom it may concern:

Be. it known that I, SAMUEL G. GREEBEA" .VVALT, a citizen of the UnitedStates, reslding at Shawinigan Falls, in the-Province of Quebec, Canada,have invented certain new and useful Improvements in Stokers, of whichthe following is aspecification.

My invention consists of an improved form of mechanical stoker. Oneobject of my invention is to provide a stoker which may be used inconnection with lime kilns or furnaces of difierent types, and whichwill quickly and efiectively operate to supply coal or other fuel to thefire boxes of the kiln or furnace.v g

One of the specific objects of my invention is to control the fuel as itis inserted within the fire box so as to distribute it evenly over thesurface of the grate.

A further object is to construct my improved stoker in such manner as torequlre' but a small amount of space and in which the several parts maybe easily operated.

A still further object is to so make the main elements of my inventionthat the coal may'be supplied thereto by any well known conveying meanswhich may be deposited at difierent angles relatively thereto.

These objects,- and other advantageous ends which will be describedhereinafter, I attain in the following manner, reference being had tothe accompanying drawings in which Figure 1 is a side elevation of myinvenr tion shown in connection with the fire box of r a kiln, thelatter being shown in section.

Fig. 2'is an end view of Fig. 1.

Fig. 3 is a fragmentary sectionalelevation on an enlarged scale. Fig. 4'is a fragmentary perspective view of a portion of my invention, and

Figs/5 and 6 are side elevations showing modified forms of certain ofthe elements of my invention. I I

Referring to the drawing. 1 represents the wall of a kiln providing a.fire box or chamber 2 having a grate 3 therein. A bracket 4 taken on theline a-a of Fig. 2, and drawn 4o secured to the outer face of the'kiln1, supvports a casing 5 having a hollow cylindrical portion 6 whichforms a housing for a rotor 7 which consists of a hub 8 having securedthereon a plurality of paddles 9.

' The hub 8 is secured to and rotatable with a shaft 10 which is mountedin suitable bearings 11 on the housing 6, and a pulley 12 is secured tothe outer end of said shaft and is driven by a belt 13 from acountershaft (not shown) or any other source of power so as to give therotor? a rotary movement in the direction of the arrow shown in Fig. 3.

The housing 6 is extended at 14 to provide a sleeve 15 in which turns ascrew conveyer 16. The screw conveyer 16 has a shaft 17 whichextends'through the extension 14 of the casing 5' at its upper end, andhas secured thereon a beveled gear 18 which meshes with another beveledgear 19 secured to a shaft 20, the latter being journaledin bearmgs 21on the upper end of the casing 5.

The shaft 20 has thereon loose and tight pulleys 22 and 23 respectively,and an'actuating belt 24 is movable by means of a belt shifter 25 tomove the belt onto either of the pulleys 22 or' 23, to either rotate orstop movement of the shaft 20.

The opposite end of the shaft, 20 is pro:

operatively' connects this sprocket with a sprocket 28 on a stud shaft29, the latter being mounted in a web or connecting bracket 30 betweenthe housing 6 and the sleeve 15.

The sprocket 28 has a crank pin 31 to which is pivotally secured one endof a link orconnecting rod 32. The other end of the connecting rod ispivotally secured on a pin 33 which projects laterally from the edge ofa deflector 34. The deflector 34 is hinged at its upper edge 35 to theinner endof a neck portion 36 of the casing 5.

The neck 36 provides a relatively narrow passage 37 which is in opencommunication with the interior of the housing 6, and the inner wall,forming the bottom of the passage 37 is arran ed at a tangent with thecurved inner surface 38 of the housing 6.

A partition 39 is formed between the sleeve 15 and the housing 6, andthis partition stops short of the upper part or extension 14 so as toprovidea passage 46 between theinterior of the housing 6 and the 40 ontothe paddles At t e same time, the sprocket'28 will be rotated to cause areciprocating movement of the connecting rod 32 which in turn will movethe deflector 34 on its pivot, and since this movement causes thedeflector to be moved at an angle to the path of movement of thefuel,'as it is being injected into the fire box, the deflector will actas a guide to distribute the fuel over different portions of the grate.For example, if the deflector is in the position shown in Fig. 3, thefuel passing through the passage 37 will be thrown to the far portion ofthe grate, and as the deflector is moved downwardly into the positionshown in Fig. 1, the fuel will strike the deflector and its directionwill be defined by the angle of the deflector so that as the deflectorgradually closes against the end of the neck 36, it will cause the fuelto be deflected to the near end of the grate.

The action of the rotor 7 is not only an action which by striking thefuel injects it into the fire box, but, a current is set up within thehousing so that there is in addition, a blowing action of the fuel intothe fire box.

The wall of the kiln is provided with a slot 43 through which theconnecting rod 32 passes, and this slot is made sufliciently large toallow a draft of air to be sucked therethsough due to the natural orpartial vacuum belng formed in the upper portion of the kiln and theconnecting rod 32 and its several parts which are thereby keptrelatively cool.

In the form of my invention shown in Fig. 5, instead of having theconveyer 16 in a verticalposition, I have shown it in a horizontalposition, which in some instances is desirable where the fuel is fedoverhead and through the elevated hoppers. In this con structlon, theshaft it of the screw conveyer 45 is rotated by means of intermeshingbeveled gears 46 and 47, the former being on the shaft 44, and thelatter on a shaft 48 which is rotated by a pulley 49 through the mediumof a belt 50.

In this instance, the sprocket 26 is rotated by the shaft 48, and thechain 27 connects the sprocket 26 with the sprocket 28 as previouslydescribed.

In the form of my invention shown in Fig. 6, I have shown a bucketconveyer 51 which may be made in any of the usual forms, and asillustrated consists of a series of buckets 52 which are connected andactuated by a chain 53 which passes over sprockets 54: and 55(diagrammatically shown).

naaaeoa In this form, the sleeve 15 is provided with a boot 56 throughwhich the fuel passes, as it is dumped from the buckets 52, into thehousing 6, and otherwise the drive is similar to that described inconnection with Figs. 1 to 4 inclusive.

It will thus be understood that my invention may be used in connectionwith any general form of conveying means which is suitable to move thefuel through the passage 40 into the housing 6 was to be conveyed andagitated due to the action of the paddles 9, and that as it passesthrough the passage 37, its direction after leaving said passageiscontrolled by means of a deflector to be evenly distributed throughoutthe surface of the grate.

The wall 1 has an opening 57 into which the neck36 fits and this opening57 is widened adjacent the inner surface of the fire box, this wideningbeing produced by an inclined surface 59 which extends from the end ofthe neck 57 to the interior of the fire box, so that the fuel mayreadily be deflected to the near end of the gate when the deflector ismoved toward the end of the neck portion.

While I have described my invention as taking a particular form, it willbe understood that the various parts of my invention may be changedwithout departing from the spirit thereof, and hence I donot limitmyself to the precise construction set forth, but consider that I am atliberty to casing providing a housing, a rotor in said housing having aplurality of paddles thereon, said casing having an elongated neckforming a complete inclosureand providing arelatively narrow passagecommunicating with the interior of said housing and ettending partwayinto the opening, said opening having an inclined bottom extendingdirectly from the lower inner edge of the neck toward said grate, meansfor rotating the rotor, a deflector hinged to the upper inner edge ofsaid neck, and means for moving said deflector toward and from the innerend of the neck, said deflector being designed to deflect fuel, which isejected through said neck by the rotor, directly on the inclined bottomof the opening and over the entire area of the grate, substantially asdescribed.

2. The combination of a furnace having an opening through its wall, acasing forming a housing, a rotor therein, a neck on said casingproviding a passage in communiscope of the appended furnace and mountedbelow said opening, a a

masses cation with the interior of the housing, and projecting into saidopening, means for actuating the rotor to cause fuel placed thereon tobe passed through the passage in the neck, a deflector adjacent the openend of the neck to vary the direction of the fuelas it passes out ofsaid neck, a sleeve having an opening communicating with the interior ofthe housing, a conveyer in said sleeve, two sprockets, a crank pin onone sprocket, a rod connecting said crank pin with the deflector andpassing through an opening in the wall of the furnace, means forrotating the other of said sprockets and the conveyer,

a chain operatively connecting the sprock- 15 ets, and means forrotating said rotor, substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

SAMUEL Gr. GREENAWALT.

Witnesses:

RHoDA E. GILLIEs, CHAs. E. Po'i'rs.

